package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOperation{
    public void work(BookList bookList){
    System.out.println("删除图书");

        System.out.println("请输入删除图书的名字：");
        Scanner scanner = new Scanner(System.in);
        String name =scanner.nextLine();

        int index = 0;
        int currentSize = bookList.getUsedSize();
        int i = 0;
        for (; i <currentSize ; i++) {
            Book book =bookList.getPos(i);
            if(book.getName().equals(name)){
                System.out.println("找到这本书了\n"+book);
                index = i;
                break;
            }
        }
        if (i == currentSize){
            System.out.println("没有你要删除的图书");
            return;
        }
        for (int j = index; j < currentSize-1; j++) {
            //[j] = [j+1]
            Book book = bookList.getPos(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(currentSize-1,null);

        bookList.setUsedSize(currentSize-1);



        System.out.println("删除结束");
    }


}
